package com.example.liunanxin.uldemo;

import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.widget.Toast;

import com.example.liunanxin.uldemo.fragments.CollectionFragment;
import com.example.liunanxin.uldemo.fragments.SearchFragment;
import com.example.liunanxin.uldemo.fragments.ShopFragment;
import com.example.liunanxin.uldemo.fragments.UserFragment;

import java.util.ArrayList;
import java.util.List;

public class HomeActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener, BottomNavigationView.OnNavigationItemSelectedListener
{

    private ViewPager viewPager;
    private BottomNavigationView bottomNavigationView;
    private FragmentPagerAdapter adapter;
    private List<Fragment> fragmentList;

    private String UserId;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);

        viewPager=findViewById(R.id.viewPager);
        bottomNavigationView=findViewById(R.id.bottomNavigationView);
        UserId = getIntent().getStringExtra("user");
        System.out.println("UserId:"+UserId);
        Toast.makeText(getApplicationContext(), "UserId --> "+UserId, Toast.LENGTH_SHORT).show();
        fragmentList = new ArrayList<>();
        fragmentList.add(new ShopFragment());
        fragmentList.add(new CollectionFragment());
        fragmentList.add(new SearchFragment());
        fragmentList.add(new UserFragment());

        adapter =new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int i) {
                return fragmentList.get(i);
            }

            @Override
            public int getCount() {
                return fragmentList.size();
            }
        };
        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(this);

        bottomNavigationView.setOnNavigationItemSelectedListener(this);

        //选中"店铺"导航按钮
        bottomNavigationView.setSelectedItemId(R.id.nav_shop);

    }

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {

        int id = 0;
        switch (menuItem.getItemId())
        {
            case R.id.nav_shop:
                id=0;
                break;
            case R.id.nav_collection:
                id=1;
                break;
            case R.id.nav_search:
                id=2;
                break;
            case R.id.nav_user:
                id=3;
                break;
        }
        System.out.println("fanhuiNa:"+id);
        viewPager.setCurrentItem(id);
        return true;

    }

    @Override
    public void onPageScrolled(int i, float v, int i1) {

    }

    @Override
    public void onPageSelected(int i) {
        int id=0;
        switch(i){
            case 0:
                id = R.id.nav_shop;
                break;
            case 1:
                id = R.id.nav_collection;
                break;
            case 2:
                id = R.id.nav_search;
                break;
            case 3:
                id = R.id.nav_user;
                break;
        }
        System.out.println("fanhuiPa:"+id);
        bottomNavigationView.setSelectedItemId(id);


    }

    @Override
    public void onPageScrollStateChanged(int i) {

    }
}
